Lower Unit - TOHATSU MFS 4D Service Manual

4 stroke
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1. Special Tools .................................... 6-2
2. Parts Layout .................................... 6-4
Drive Shaft Housing .............................. 6-4
Gear Case (Drive Shaft) • Gear Case
(Propeller Shaft) .................................... 6-6
3. Inspection Item .............................. 6-10
1) Draining Gear Oil .............................. 6-10
2) Removing Propeller ........................... 6-10
3) Removing Lower Unit Ass'y .................. 6-11
4) Disassembly of Water Pump ............... 6-11
5) Inspection of Water Pump .................. 6-12
6) Removing Propeller Shaft Housing Ass'y ...... 6-13
7) Disassembly of Propeller Shaft Housing ...... 6-14
8) Inspection of Propeller Shaft Housing ......... 6-14
9) Assembly of Propeller Shaft Housing...... 6-15
10) Removing Drive Shaft ........................ 6-15
11) Disassembly of Propeller Shaft Ass'y ...... 6-16
12) Inspection of Propeller Shaft ............... 6-16
13) Assembly of Propeller Shaft Ass'y ......... 6-16
14) Removing Clutch Cam and Cam Rod ... 6-17
15) Disassembly of Clutch Cam and
Cam Rod .......................................... 6-17
6

Lower Unit

16) Inspection of Clutch Cam and Cam Rod ...... 6-17
17) Assembly of Clutch Cam and Cam Rod ......6-18
18) Removing Pump Case (Lower) ............ 6-18
19) Disassembly of Pump Case (Lower) ...... 6-18
20) Assembly of Pump Case (Lower) ......... 6-19
21) Inspection of Drive Shaft ..................... 6-19
22) Inspection of Pinion (B) Gear and
Forward (A) Gear .............................. 6-19
23) Disassembly of Gear Case .................. 6-20
24) Inspection of Gear Case ..................... 6-21
25) Assembly of Gear Case ..................... 6-21
26) Installation of Forward Gear and
Pinion Gear (A and B Gears) ............... 6-22
27) Reassembly of Pump Case (Lower) ...... 6-22
28) Installation of Clutch Cam and Cam Rod ...... 6-22
29) Determination of forward (A) gear
backlash .......................................... 6-23
30) Installation of Water Pump .................. 6-25
31) Installation of Propeller Shaft Housing ......... 6-26
32) Filling with Gear Oil ........................... 6-27
33) Installation of Lower Unit Ass'y ............ 6-27
6

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